159 lines
3.2 KiB
Go
159 lines
3.2 KiB
Go
/*
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Copyright © 2022 - 2025 SUSE LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package types
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import (
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"fmt"
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"net/url"
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"path/filepath"
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"gopkg.in/yaml.v3"
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"github.com/distribution/distribution/reference"
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)
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const (
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docker = "docker"
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oci = "oci"
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file = "file"
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dir = "dir"
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)
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// ImageSource represents the source from where an image is created for easy identification
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type ImageSource struct {
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source string
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srcType string
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digest string
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}
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func (i *ImageSource) SetDigest(digest string) {
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i.digest = digest
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}
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func (i ImageSource) GetDigest() string {
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return i.digest
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}
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func (i ImageSource) Value() string {
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return i.source
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}
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func (i ImageSource) IsImage() bool {
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return i.srcType == oci
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}
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func (i ImageSource) IsDir() bool {
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return i.srcType == dir
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}
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func (i ImageSource) IsFile() bool {
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return i.srcType == file
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}
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func (i ImageSource) IsEmpty() bool {
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if i.srcType == "" {
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return true
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}
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if i.source == "" {
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return true
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}
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return false
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}
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func (i ImageSource) String() string {
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if i.IsEmpty() {
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return ""
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}
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return fmt.Sprintf("%s://%s", i.srcType, i.source)
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}
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func (i ImageSource) MarshalYAML() (interface{}, error) {
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return i.String(), nil
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}
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func (i *ImageSource) UnmarshalYAML(value *yaml.Node) error {
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return i.updateFromURI(value.Value)
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}
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func (i *ImageSource) CustomUnmarshal(data interface{}) (bool, error) {
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src, ok := data.(string)
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if !ok {
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return false, fmt.Errorf("can't unmarshal %+v to an ImageSource type", data)
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}
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err := i.updateFromURI(src)
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return false, err
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}
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func (i *ImageSource) updateFromURI(uri string) error {
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u, err := url.Parse(uri)
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if err != nil {
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return err
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}
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scheme := u.Scheme
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value := u.Opaque
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if value == "" {
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value = filepath.Join(u.Host, u.Path)
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}
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switch scheme {
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case oci, docker:
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return i.parseImageReference(value)
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case dir:
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i.srcType = dir
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i.source = value
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case file:
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i.srcType = file
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i.source = value
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default:
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return i.parseImageReference(uri)
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}
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return nil
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}
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func (i *ImageSource) parseImageReference(ref string) error {
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n, err := reference.ParseNormalizedNamed(ref)
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if err != nil {
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return fmt.Errorf("invalid image reference %s", ref)
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} else if reference.IsNameOnly(n) {
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ref += ":latest"
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}
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i.srcType = oci
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i.source = ref
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return nil
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}
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func NewSrcFromURI(uri string) (*ImageSource, error) {
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src := ImageSource{}
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err := src.updateFromURI(uri)
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return &src, err
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}
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func NewEmptySrc() *ImageSource {
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return &ImageSource{}
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}
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func NewDockerSrc(src string) *ImageSource {
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return &ImageSource{source: src, srcType: oci}
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}
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func NewFileSrc(src string) *ImageSource {
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return &ImageSource{source: src, srcType: file}
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}
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func NewDirSrc(src string) *ImageSource {
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return &ImageSource{source: src, srcType: dir}
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}
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